A multi-stage series connection horizontal roller group high-temperature molten steel slag waste heat utilization device
By using a multi-stage series horizontal drum assembly and a waste heat recovery system, the problems of low waste heat recovery efficiency and high water consumption in steel slag treatment have been solved, achieving efficient and environmentally friendly steel slag treatment and waste heat utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 张英辰
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-24
AI Technical Summary
In existing steel slag treatment methods, high-temperature sensible heat resources are not effectively recovered, resulting in energy waste, high water consumption, and easy environmental pollution.
A multi-stage series horizontal drum assembly is adopted, which combines crushing and conveying components to achieve synchronous crushing and axial conveying of steel slag. The heat energy of the steel slag is recovered through a waste heat recovery system, avoiding the use of water cooling.
It improves the efficiency of steel slag treatment and energy recovery rate, reduces water consumption, reduces environmental pollution, and achieves efficient and environmentally friendly waste heat utilization.
Smart Images
Figure CN224552109U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel slag waste heat recovery technology, specifically to a multi-stage series horizontal drum assembly for utilizing the waste heat of high-temperature molten steel slag. Background Technology
[0002] In the steel metallurgical process, a large amount of high-temperature molten steel slag with temperatures exceeding 1300℃ is generated. Currently, the commonly used steel slag treatment methods in the industry, such as hot pouring, pool quenching, or horizontal drum methods, mainly focus on cooling and solidifying the steel slag to facilitate subsequent processing. These methods mostly have the following drawbacks: First, the huge amount of high-temperature sensible heat resources contained in the steel slag are not effectively recovered, resulting in serious energy waste; second, many processes (especially water quenching processes) require a large amount of water resources and generate water vapor carrying a large amount of dust during the cooling process, causing pollution to the atmospheric environment, and also placing a heavy burden and high operating costs on the company's environmental protection facilities.
[0003] Therefore, developing a technology and equipment that can efficiently and environmentally process high-temperature molten steel slag and recover its high-grade heat energy during the process is of great significance for energy conservation, emission reduction and sustainable development in the steel industry. Utility Model Content
[0004] The purpose of this invention is to provide a multi-stage series horizontal drum assembly for utilizing the waste heat of high-temperature molten steel slag, aiming to solve the problems of low efficiency in steel slag waste heat recovery, high water consumption, and easy generation of secondary pollution in the existing technology.
[0005] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution:
[0006] A multi-stage series horizontal drum assembly for utilizing the waste heat of high-temperature molten steel slag includes:
[0007] At least one horizontal drum, with its two ends forming a feed end and a discharge end for steel slag, respectively;
[0008] Waste heat recovery system, used to recover the heat energy released by the steel slag inside the horizontal drum;
[0009] A crushing component is disposed inside at least one of the horizontal drums for crushing steel slag that has cooled and solidified inside the horizontal drums.
[0010] A conveying component, disposed inside all of the horizontal drums, is used to cause the steel slag to move along the axial direction of the horizontal drums from the feed end to the discharge end.
[0011] The horizontal drum is configured to rotate about its axis to drive the steel slag to move circumferentially inside it and to move relative to the crushing member and the conveying member, so as to achieve synchronous crushing and axial conveying of the steel slag.
[0012] Furthermore, the crushing component and the conveying component are integrated into one body to form a set of crushing teeth that are fixedly arranged and do not rotate with the horizontal drum. The crushing teeth have a spiral working wall surface that extends along the axial direction of the horizontal drum.
[0013] When the horizontal drum rotates, the steel slag is crushed by relative movement with the fixed crushing teeth, and is pushed axially by the spiral working wall.
[0014] In another embodiment, the conveying component is a continuous spiral blade disposed on the inner wall of the horizontal drum and rotating synchronously therewith;
[0015] The crushing component is a set of crushing teeth fixed on the inner wall of the horizontal drum and rotating synchronously with it, and the crushing teeth are arranged between the continuous spiral blades.
[0016] In another embodiment, the conveying component is an intermittent spiral blade disposed on the inner wall of the horizontal drum and rotating synchronously therewith;
[0017] The crushing component is a set of fixed crushing teeth that do not rotate with the horizontal drum, and the crushing teeth are located at the break points of the intermittent spiral blades;
[0018] When the horizontal drum rotates, the steel slag is conveyed to the break point by the spiral blades and is crushed by colliding with the fixed crushing teeth. The crushed steel slag then moves to the next section of the spiral blades.
[0019] Furthermore, the horizontal drum includes a front drum, an intermediate drum, and a rear drum arranged sequentially along the movement path of the steel slag and capable of rotating independently around its axis, so as to process steel slag in different temperature ranges in stages.
[0020] Furthermore, it also includes a material conveying device for conveying steel slag between the front roller, the intermediate roller and the rear roller.
[0021] Furthermore, the material conveying device includes a chute or chain conveyor connecting the front roller and the intermediate roller, as well as the intermediate roller and the rear roller.
[0022] Furthermore, the waste heat recovery system includes:
[0023] A gas-liquid separator is installed outside the horizontal drum and is used to separate gas-water mixtures.
[0024] A jacketed cooler is installed in the shell jacket of the horizontal drum and is used to input room temperature water and output high temperature water.
[0025] A radiant heat exchanger is suspended inside the horizontal drum and located above the crushing component. The radiant heat exchanger includes an evaporation section and a superheating section.
[0026] The evaporation section and the superheating section are configured as follows:
[0027] The evaporation section is used to input the high-temperature water from the jacketed cooler and output a gas-water mixture to the gas-liquid separator. The gas-water mixture is separated into water and saturated steam. The water is returned to the evaporation section and the saturated steam is output to the superheating section to generate superheated steam.
[0028] The evaporation section and the superheating section are respectively located inside the front drum, the intermediate drum, and the rear drum according to their operating temperatures.
[0029] The advantages of this application compared to the prior art are:
[0030] This invention provides a multi-stage series horizontal drum assembly for utilizing the waste heat of high-temperature molten steel slag. In this embodiment, the continuous rotation of the horizontal drum and the cooperation of its internal conveying and crushing components enable the simultaneous crushing and axial conveying of the steel slag by utilizing the rotation of the horizontal drum. At the same time, the waste heat recovery system recovers the heat energy released by the steel slag inside the horizontal drum. The structure is simple and requires no water throughout the process. Attached Figure Description
[0031] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0032] Figure 1 This is a side view of an embodiment of the present utility model;
[0033] Figure 2 for Figure 1 A cross-sectional view along the AA direction;
[0034] Figure 3 This is a front view of a horizontal tank according to an embodiment of the present utility model;
[0035] Figure 4 for Figure 3 A cross-sectional view along the BB direction;
[0036] Figure 5 This is a front view of another horizontal tank according to an embodiment of the present utility model;
[0037] Figure 6 for Figure 5 A cross-sectional view along the CC direction;
[0038] Figure 7 This is a front view of another horizontal tank according to an embodiment of the present utility model;
[0039] Figure 8 for Figure 7 A cross-sectional view along the DD direction;
[0040] The labels in the diagram represent the following:
[0041] 1-Pre-stage roller; 2-Intermediate roller; 3-Rear roller; 4-Funnel-type receiving device; 5-Chain plate conveyor; 6-Crushing tooth; 61-Working wall; 7-Helical blade; 8-Radiation heat exchanger; 81-Evaporation section; 82-Superheating section. Detailed Implementation
[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0043] This utility model proposes a multi-stage series horizontal drum assembly for utilizing the waste heat of high-temperature molten steel slag, hereinafter referred to as the device.
[0044] refer to Figure 1 and Figure 2 The device includes a horizontal roller assembly, a material conveying system, and a cooling pipeline system.
[0045] The horizontal drum unit is the core of continuous steel slag processing. The steel slag moves along the length of the horizontal drum unit and is continuously cooled, thus forming roughly three temperature zones: the pre-stage, the intermediate stage, and the post-stage.
[0046] The horizontal drum assembly includes a front drum 1, an intermediate drum 2, and a rear drum 3, which correspond to three temperature ranges and are connected in series. All horizontal drums are cylindrical containers that are horizontally arranged and can rotate around their central axis.
[0047] It should be noted that the total number of horizontal rollers depends on the structural strength of the cooling piping system: when the structural strength of the cooling piping system is high, the number of horizontal rollers can be appropriately reduced; when the structural strength of the cooling piping system is low, the length of each horizontal roller should be reduced, and the number of horizontal rollers should be increased accordingly, thereby reducing the length of the cooling piping system inside each horizontal roller.
[0048] Therefore, the front roller 1, the intermediate roller 2, and the rear roller 3 can be three independent entities, or they can be a whole, or any two of them can form a whole. If necessary, there can be more than one horizontal roller in each stage.
[0049] In the above-mentioned horizontal drum:
[0050] The front roller 1 serves as the system inlet, and a funnel-shaped receiving device 4 is installed at its front end to receive and guide high-temperature molten steel slag at approximately 1400°C into it.
[0051] The front drum 1 contains a first crushing component, which functions to crush the steel slag into larger particles through mechanical action during the process of cooling and solidifying the steel slag from the liquid state. During this stage, the temperature of the steel slag drops to about 1000℃.
[0052] Intermediate drum 2 is connected in series after the preceding drum 1 and is used to receive larger steel slag particles processed by the preceding drum 1. The horizontal drum has a built-in second crushing component, which is used to further crush and refine these larger particles into smaller particles with a particle size of no more than 20 mm. During this process, the temperature of the steel slag drops to about 600°C.
[0053] The rear drum 3, as the outlet of the horizontal drum assembly, is connected in series after the intermediate drum 2. It is used to receive smaller steel slag particles from the intermediate drum 2 and to complete the final cooling during the conveying process inside it, so that the temperature of the steel slag drops to a target temperature of about 200°C for subsequent storage or utilization.
[0054] The material conveying system ensures the continuous flow of steel slag between the rollers of each stage. In addition to the funnel-type receiving device 4 mentioned above, the material conveying system also includes: a material conveying device set between the discharge port of the front roller 1 and the feed port of the intermediate roller 2, and between the discharge port of the intermediate roller 2 and the feed port of the rear roller 3.
[0055] The material conveying device can be a chute or a chain conveyor 5. In this embodiment, the material conveying device is preferably a high-temperature resistant chain conveyor 5. They smoothly convey the steel slag processed in the previous stage to the next stage at a set speed, thereby forming a complete continuous production line.
[0056] On the other hand, the cooling pipeline system distributes the various functional units of the steam generation system (economizer, evaporation section 81, and superheating section 82) to horizontal drums in different temperature ranges, realizing the cascade utilization of energy.
[0057] refer to Figure 2 The cooling piping system includes a jacketed cooler, a radiant heat exchanger 8, and a gas-liquid separator. Only the jacketed cooler and the radiant heat exchanger 8 are shown in the figure; the gas-liquid separator is not shown.
[0058] The jacketed cooler is equivalent to an economizer. It is installed in the shell sandwich of the front drum 1, the intermediate drum 2 and the rear drum 3, and is used to preheat room temperature water into high temperature water.
[0059] In this embodiment, after the external ambient temperature water is pumped into the jacketed cooler, its flow path is designed as a counter-current heat exchange mode, that is, the water flow direction is opposite to the steel slag flow direction.
[0060] Specifically: ambient temperature water at approximately 20°C first enters the jacket of the rear drum 3, absorbing the low-temperature waste heat from the steel slag in the temperature range of approximately 200°C to 600°C, raising its temperature to approximately 50°C; then it flows to the jacket of the intermediate drum 2, absorbing the medium-temperature waste heat in the temperature range of approximately 600°C to 1000°C, raising its temperature to approximately 70°C; finally, it flows to the jacket of the front drum 1, absorbing the high-temperature waste heat in the temperature range of approximately 1000°C to 1400°C, raising its temperature to approximately 85°C, and then enters the radiant heat exchanger 8.
[0061] The radiant heat exchanger 8 includes an evaporation section 81 and a superheating section 82. There are two evaporation sections 81, which are respectively located inside the front drum 1 and the rear drum 3. The superheating section 82 is located inside the intermediate drum 2.
[0062] First, the preheated high-temperature water is sent to the evaporation section 81. Inside the front drum 1, the evaporation section 81 utilizes the strong thermal radiation and convection heat transfer of the highest temperature zone of the steel slag. Inside the rear drum 3, the evaporation section 81 further absorbs the low-grade heat energy in the steel slag, thereby heating the water to form a gas-water mixture.
[0063] Then, the gas-water mixture enters the interior of the gas-liquid separator and is separated into saturated steam and water. The water returns to the evaporation section 81 through the downcomer connecting the gas-liquid separator and the evaporation section 81, while the saturated steam is transported to the superheating section 82.
[0064] Finally, inside the intermediate drum 2, saturated steam undergoes efficient heat exchange with medium-temperature steel slag at approximately 600℃ to 1000℃, significantly increasing the temperature and ultimately forming superheated steam that is output to the external pipeline network.
[0065] On the other hand, in order to achieve the crushing and axial conveying of steel slag while the horizontal drum is rotating, the specific structure of the crushing component and the conveying component can be designed in various ways. This embodiment lists three schemes below.
[0066] refer to Figure 3 and Figure 4 The first option for the crushing and conveying components is:
[0067] The crushing component and the conveying component are integrated. They are designed as a set of specially designed crushing teeth 6. These crushing teeth 6 are fixed near the central axis inside the horizontal drum by a robust bracket (with built-in cooling water channels) and are located below the radiant heat exchanger. The crushing teeth 6 do not rotate with the horizontal drum.
[0068] Furthermore, among all the wall surfaces that the crushing tooth 6 can contact with the steel slag, at least one working wall surface 61 that contacts the steel slag is designed as a spiral surface shape extending along the axis of the horizontal drum.
[0069] Its working principle is as follows: When the horizontal drum rotates, the steel slag inside is carried to a certain height by gravity and friction and then tumbles down. During this process, the steel slag and the fixed crushing teeth 6 undergo violent relative motion. On the one hand, the steel slag is effectively crushed by the impact, shearing and grinding action of the crushing teeth 6. On the other hand, due to the spiral guiding action of the working wall 61 of the crushing teeth 6, the tumbling steel slag will be subjected to an axial thrust when it comes into contact with the wall, and thus be continuously and stably pushed from the feed end to the discharge end of the horizontal drum.
[0070] refer to Figure 5 and Figure 6 The second option for the crushing and conveying components is:
[0071] The conveying component is designed as: continuous spiral blades 7 welded to the inner wall of the horizontal drum.
[0072] The crushing component is designed as a set of crushing teeth 6 fixed inside the horizontal drum and rotating synchronously with the horizontal drum. The crushing teeth 6 are installed in the pitch space between the continuous spiral blades 7.
[0073] Its working principle is as follows: When the horizontal drum rotates, the continuous spiral blades 7 serve as the main conveying mechanism, driving the steel slag to move forward steadily along the axial direction; at the same time, the crushing teeth 6, which are attached to the tank wall and rotate together, scrape, impact and squeeze the steel slag as it rolls and slides due to the action of the spiral blades 7, thereby achieving crushing.
[0074] refer to Figure 7 and Figure 8 The third option for the crushing and conveying components is:
[0075] The conveying component is designed as: intermittent helical blades 7 welded to the inner wall of the horizontal drum.
[0076] The crushing component is designed as a set of crushing teeth 6 fixed inside the horizontal drum by a robust bracket (with built-in cooling water channels). The crushing teeth 6 do not rotate with the horizontal drum and are precisely positioned at the break points of the discontinuous spiral blades 7.
[0077] Its working principle is as follows: When the horizontal drum rotates, the spiral blades 7 on the inner wall first play a conveying role, pushing the steel slag forward along the axial direction; when the steel slag moves to the break area of the blade, due to the loss of the support and push of the blade, the steel slag falls and collides with the crushing tooth 6 fixed at this place, and is thus crushed; the crushed steel slag is then captured by the next spiral blade 7 and continues to be conveyed forward.
[0078] Preferably, in this embodiment, reference Figure 1 and Figure 2 :
[0079] The crushing and conveying components inside the front drum 1 adopt either the first or third scheme, using large, fixed crushing teeth 6 to strongly agitate, collide with, and propel the steel slag, thereby achieving severe crushing of the steel slag.
[0080] The crushing and conveying components inside the intermediate drum 2 adopt the second scheme, which utilizes several small crushing teeth 6 that can be densely distributed inside the intermediate drum 2 to achieve fine crushing of steel slag.
[0081] The rear drum 3 does not have any crushing components inside; it only uses continuous spiral blades 7 as conveying components.
[0082] In summary, this invention, through the design of a multi-stage series horizontal drum, decomposes the steel slag treatment and waste heat recovery process into multiple serial and continuous stages, and realizes the cascade utilization of energy through a cooling pipeline system. This not only improves the processing efficiency and energy recovery rate, but also makes the entire system more compact and automated, and has significant industrial application value.
[0083] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of this utility model.
Claims
1. A multi-stage series horizontal drum assembly for utilizing the waste heat of high-temperature molten steel slag, characterized in that, include: At least one horizontal drum, with its two ends forming a feed end and a discharge end for steel slag, respectively; Waste heat recovery system, used to recover the heat energy released by the steel slag inside the horizontal drum; A crushing component is disposed inside at least one of the horizontal drums for crushing steel slag that has cooled and solidified inside the horizontal drums. A conveying component, disposed inside all of the horizontal drums, is used to cause the steel slag to move along the axial direction of the horizontal drums from the feed end to the discharge end. The horizontal drum is configured to rotate about its axis to drive the steel slag to move circumferentially inside it and to move relative to the crushing member and the conveying member, so as to achieve synchronous crushing and axial conveying of the steel slag.
2. The multi-stage series horizontal drum assembly high-temperature molten steel slag waste heat utilization device according to claim 1, characterized in that, The crushing component and the conveying component are integrated into one body to form a set of crushing teeth (6) that are fixed and do not rotate with the horizontal drum. The crushing teeth (6) have a spiral working wall surface (61) that extends along the axial direction of the horizontal drum. When the horizontal drum rotates, the steel slag moves relative to the fixed crushing teeth (6) and is crushed, and is pushed axially by the spiral working wall (61).
3. The multi-stage series horizontal drum assembly high-temperature molten steel slag waste heat utilization device according to claim 1, characterized in that, The conveying component is a continuous spiral blade (7) disposed on the inner wall of the horizontal drum and rotating synchronously with it; The crushing component is a set of crushing teeth (6) fixed on the inner wall of the horizontal drum and rotating synchronously with it. The crushing teeth (6) are arranged between the continuous spiral blades (7).
4. The multi-stage series horizontal drum assembly high-temperature molten steel slag waste heat utilization device according to claim 1, characterized in that, The conveying component is an intermittent spiral blade (7) disposed on the inner wall of the horizontal drum and rotating synchronously with it; The crushing component is a set of fixed crushing teeth (6) that do not rotate with the horizontal drum. The crushing teeth (6) are located at the break point of the intermittent spiral blades (7). When the horizontal drum rotates, the steel slag is conveyed to the break point by the spiral blades (7) and is crushed by colliding with the fixed crushing teeth (6). The crushed steel slag moves to the next section of the spiral blades (7).
5. The multi-stage series horizontal drum assembly high-temperature molten steel slag waste heat utilization device according to claim 1, characterized in that, The horizontal drum includes a front drum (1), a middle drum (2) and a rear drum (3) arranged sequentially along the movement path of the steel slag and capable of rotating independently around its axis, so as to process steel slag in different temperature ranges in stages.
6. The multi-stage series horizontal drum assembly high-temperature molten steel slag waste heat utilization device according to claim 5, characterized in that, It also includes a material conveying device for conveying steel slag between the front roller (1), the intermediate roller (2) and the rear roller (3).
7. The multi-stage series horizontal drum assembly high-temperature molten steel slag waste heat utilization device according to claim 6, characterized in that, The material conveying device includes a chute or chain conveyor (5) connecting the front roller (1) and the intermediate roller (2), as well as the intermediate roller (2) and the rear roller (3).
8. The multi-stage series horizontal drum assembly high-temperature molten steel slag waste heat utilization device according to claim 5, characterized in that, The waste heat recovery system includes: A gas-liquid separator is installed outside the horizontal drum and is used to separate gas-water mixtures. A jacketed cooler is installed in the shell jacket of the horizontal drum and is used to input room temperature water and output high temperature water. A radiant heat exchanger is suspended inside the horizontal drum and located above the crushing component. The radiant heat exchanger includes an evaporation section (81) and a superheating section (82). The evaporation section (81) and the superheating section (82) are configured as follows: The evaporation section (81) is used to input the high-temperature water from the jacketed cooler and output a gas-water mixture to the gas-liquid separator, the gas-water mixture being separated into water and saturated steam, the water being returned to the evaporation section (81), and the saturated steam being output to the superheating section (82) to generate superheated steam; The evaporation section (81) and the superheating section (82) are respectively located inside the front roller (1), the intermediate roller (2) and the rear roller (3) according to their own operating temperatures.